The Canon BP-A30 Battery Pack For EOS C300 Mark II battery pack mounts on your Canon C300 Mark II Camera, providing 45 Watt hours of power. It is a rechargeable lithium ion battery compatible with Canon's Intelligent Battery system.
The battery incorporates a small push button that activates the remaining power indicators on the battery itself, allowing you to quickly determine the approximate power level of the battery, without having to attach it to a camera.